Dual-Channel

Audio Difference Amplifier

Preliminary Technical Data

AD8273

Rev. PrA

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FEATURES

Two gain settings:

Gain of 1/2 (–6 dB)

Gain of 2 (6 dB)

0.03% max gain accuracy

10 ppm max gain drift

Excellent AC Specifications

25V/μs slew rate

0.9 μs to 0.01% settling time

Low Distortion

0.003% at 1 kHz

High Accuracy DC Performance

90 dB typ CMRR

250 uV max offset voltage

14 lead SOIC Package

Supply current: 2.5 mA per channel

Supply range: ±2.5 V to ±18 V

APPLICATIONS

High Performance Audio

Instrumentation Amplifier Building Block

Level Translator

Automatic Test Equipment

Sin/Cos Encoders

GENERAL DESCRIPTION

The AD8273 is a low distortion, dual-channel amplifier with

internal gain setting resistors. With no external components, it

can be configured as a high performance difference amplifier

(G=0.5 or 2), inverting amplifier (G=0.5 or 2) or non-inverting

amplifier (G=1.5 or 3).

The AD8273 operates on both single and dual supplies and only

requires 2.5 mA maximum supply current for both amplifiers. It

is specified over the industrial temperature range of −40°C to

+85°C and is fully RoHS compliant.

FUNCTIONAL BLOCK DIAGRAM

+

–

–IN1

+IN1

SENSE1

REF1

OUT1

+

–

–IN2

+IN2

SENSE2

REF2

OUT2

2

3

12

13

14

6

5

10

9

8

11

4

6kΩ

12kΩ

12kΩ

12kΩ

12kΩ

6kΩ

6kΩ

6kΩ

Figure 1. AD8273 Dual Difference Amplifier

Table 1. Difference Amplifiers by Category

Low

Distortion

High

Voltage

Single Supply

Uni-directional

Single Supply

Bi-directional

AD8270

AD8273

AMP03

AD628

AD629

AD8212

AD8202

AD8203

AD8205

AD8206

AD8210